Improvement in dumb-waiters



J. MURTAUGH.

DUMB-WAITERS.

INVEN TOR Patented Sept.25,1877.

ATTORNEYS.

NPETERS, FHoTmLlmoeAPnsn. WASHINGTON. u c

UNITED STATES PATENT OFFICE.

JAMES MURTAUGH, OF NEW YORK, N. Y.

IMPROVEMENT IN DUMB-WAITERS.

Specification forming part of Letters Patent No. 195,526, datedSeptember 25, 1877; application filed July 13, 1877.

To all whom it may concern:

Be it known that I, J AMES MURTAUGII, of the city, county, and State ofNew York, have invented a new and Improved Dumb-Waiter, of which thefollowing is a specification:

This invention relates to that class of elevators known as dumb-waiters5 and the nature of my invention consists in so constructing adumb-waiter in a building that it can be conveniently used by dilerentfamilies residing in the several stories of the building and in adjacentapartments on the same llats, as will be hereinafter explained.

In the annexed drawings, Figure 1 is asectional elevation of one side ofthe improved dumb-waiter, showing the upper portion of the same. Fig. 2is an end view. Fig. 3 is a top view.

Similar letters of reference indicate correspondingparts.

The lettersAAdesignate the upright guides or frame of the improvement,which will extend from the basement or cellar of a building to thehighest story thereof. In the center of each upright is a rib, a, whichis embraced by lugs b on the cage (l, thus guiding it in its verticalmovements and keeping it steady.

The cage U is rectangular in form, and has a number of broad shelves. Itis suspended by means of a rope, D, which passes over a grooved pulley,E, on a shaft carrying a spurwheel, F. The rope D has a weight, W, se

cured to it, which is inclose'd in a box, G, on the outside of one ot'the uprights A.

-The spur-wheel F engages with a pinion, b, on a shaft, H, which has itsbearings in horizontal beams B. On shaft H are keyed two large groovedpulleys, J J, and two grooved brake-Wheels, K K. The pulleys J haveshort transverse ribs fixed across their grooved peripheries, to preventthe endless actuatingropes L from slipping.

Around the brake-wheels K K are applied brake-straps N N, the ends ofwhich are connected to the angular ends of levers P P, having theirfulcra on the horizontal beams B of the uprights A.

R designates a weight, which is suspended by two ropes, d d, which passover pulleys p p and under grooved pulleys p', and are attached to theupper ends of the brake-levers P P. The weight R hangs free, and acts onboth levers to free the brake-straps from their wheels K K.

S S are ropes, which are attached to the upper ends of levers P P,carried over pulleys t t, and attached to weights V V, which are locatedin the basement of the building.

By pulling on one of the ropes S the brakestrap ofthe lever connected tosuch rope will be drawn tightly around its drum or wheel. At the sametime weight Rwill be raised. When this weight B is released the weight Von the rope S opposite to that which was pulled will cause its lever tooperate the brake-strap. Thus it will be seen that both brakes arebrought into operation by drawing on either one of the ropes S.

By my invention a single elevator or dumb- Waiter will answer for anumber of tenants living in separate apartments.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with a dumbwaiter cage having liftand brake mechanism, substantially as described, of the weightssuspended by ropes attached to the upper ends of levers P, as and forthe purpose specified.

JAMES MURTAUGH.

Witnesses:

R. T. CAMPBELL, C. SEDewIcK.

